Orientations of palaeotectonic features as a key to understanding the neotectonic block rotation of the Kocaeli peninsula, NW Turkey

Gürbüz, Alper

doi:10.1080/00206810802655963

Cited by 6 publications

(4 citation statements)

References 65 publications

(70 reference statements)

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“…It contains both angular and rounded pieces of local materials (metamorphic and sedimentary rocks) and occasionally thin lenses of sandy silt with pebbles and gravel. This poorly sorted and aggradating debris was deposited over large areas during the late Pliocene during the development of the Izmit-Sapanca Corridor by the strike-slip tectonics of the NAF (Gü rbü z and Gü rer, 2008bGü rer, , 2009Gü rbü z, 2009a). Similarly, the Middle PleistoceneHolocene (Q 1 and Q 2 ) deposits mainly consist of coarsegrained deposits of alluvial fan and fluvial sediments along the margins of the corridor.…”

Section: Geological Settingmentioning

confidence: 99%

Science versus myth: was there a connection between the Marmara Sea and Lake Sapanca?

Gürbüz

Leroy

2010

J Quaternary Science

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The existence of an alternative strait between the Black and Marmara Seas, east of today's Istanbul Strait, on the route of Izmit Gulf-Lake Sapanca-Lower Sakarya Valley, was already claimed at the end of the 19th century and has also been considered in several recent studies. Firstly, in historical documents over the last 2500 years, some natural and artificial waterways between the Marmara Sea and Lake Sapanca have been reported. Secondly, according to the present geomorphological research between the Izmit Gulf and Lake Sapanca, the gutter-like morphology, which was formed by the tectonics of the North Anatolian Fault in the centre of the plain, is suggested as a suitable geomorphic feature for a possible waterway between the gulf and the lake. Thirdly, the Izmit Plain that lies between the Izmit Gulf and Lake Sapanca is studied in this paper through its sedimentology. The facies associations of the basin-fill deposits are examined here through the lithological descriptions and fossil assemblages in nine cores drilled in the plain. All these data suggest that the shoreline in the Quaternary did not lie much further landward from its current position, that the inner part of the plain was covered by a lagoon/coastal-swamp environment and that a connection may have existed at an unknown time (perhaps for the last time during the Middle/Late Pleistocene) with perhaps only partial reuse during the last millennia in the course of catastrophic seismic movements and consecutive floods.

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Section: Geological Settingmentioning

confidence: 99%

Science versus myth: was there a connection between the Marmara Sea and Lake Sapanca?

Gürbüz

Leroy

2010

J Quaternary Science

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“…3). Gentle hills border the lake on the north (Gürbüz and Gürer, 2008b;Gürbüz, 2009). Lake Sapanca occupies a pull-apart basin created by a step-over along the NAFZ (Barka et al, 2000;Lettis et al, 2000;Rathje et al, 2004;Gürbüz and Gürer, 2008a, 2008c.…”

Section: (Figs 1b 2 and 3)mentioning

confidence: 99%

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Leroy

Boyraz

Gürbüz

2009

Quaternary Science Reviews

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High-resolution palynological analysis of a 38-cm-long core collected from Lake Sapanca, northwest Turkey, reveals large earthquakes that occurred during the second half of the 20 th century along the North Anatolian Fault Zone. Four events have disturbed the lacustrine sedimentary sequence. Three of the four events are historical earthquakes in 1999 in Izmit, 1967 in Mudurnu and 1957 in Abant. These events are recorded in the core by turbiditic deposits and reworked sediment and by low overall palynomorph concentrations but high values of thick-exined pollen, fern spores and fungal spores. Palynomorphs in the event beds have been grouped based on their associations in modern moss, river and lake samples. The inferred mechanisms of transport and sources for the palynomorphs are: 1-lake sediment displaced by slump, 2-collapsed shoreline sediment owing to seiche, waves and sudden lake level changes, 3-subsidence of deltas and 4river-transported soil and sediment from upland areas. The 1999 Izmit earthquake is only weakly recorded by palynomorphs, probably due to recent engineering control on the rivers. The 1967 Mudurnu earthquake had the strongest effect on the lake, introducing successive packages of sediment to the centre of the lake from underwater slopes, the lakeshore and rivers.

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“…This regime is related to a palaeotectonic compressional axis during the Neotectonic period (Bellier et al, 1997). These palaeotectonic properties were reactivated in the Neotectonic period in the area (Gürbüz, 2009). This study explains the role of Neotectonic movements on geomorphological units and provides the results of morphometric index-based analysis.…”

Section: Introductionmentioning

confidence: 69%

Yeşilırmak Havzası Yukarı Mecrasında Almus Fayı Boyunca Drenajın Gelişimi

Altın¹,

Altın²

2020

JGEOG

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The Yeşilırmak River Basin is located in the North Anatolian Fault Zone (NAFZ) which is one of the fault zones with intense seismic activity in Turkey. The Almus Fault is a segment of the North Anatolian Fault (NAF). This study aims to reveal the effect of the Almus Fault on the drainage development and morphotectonic evolution of the upper catchment of the Yeşilırmak River Basin and the relative tectonic activity of the fault. Morphometric indices such as, stream length gradient index (SL), mountain front sinuosity (Smf) and fan entrenchment (E) indicate that the downward of the sub-basins is tectonically more active than the upward which is ascribed to the tectonic activities along the Almus Fault. The Smf value is 1.4 at the west and decreases to 1.1 at the mouth of the sub-basins on the east. This indicates that the tectonic activity along the Almus fault in the study area increases from west to east and the uplift rate in the northern part is higher than the southern part of the study area. Development of the drainage network started during Pliocene due to differential uplift and a humid climate then developed under tectonic forcing during Quaternary.

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Orientations of palaeotectonic features as a key to understanding the neotectonic block rotation of the Kocaeli peninsula, NW Turkey

Cited by 6 publications

References 65 publications

Science versus myth: was there a connection between the Marmara Sea and Lake Sapanca?

Science versus myth: was there a connection between the Marmara Sea and Lake Sapanca?

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Yeşilırmak Havzası Yukarı Mecrasında Almus Fayı Boyunca Drenajın Gelişimi

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